detect the precense of the body inside enclosure
detect the precense of the body inside enclosure
(OP)
Hello everyone,
I have a problem and i need help,
I am designing an access control,
Generally the system go to sleep mode in order to save the battery life,
The problem is that i want the system to detect the presence of the Mifare RFID tag in order to go to wake up mode,
knowing that the electronics is to be enclosed in a metal body with a plastic cover,
What type of sensing method can be used in order to detect the presence of the tag knowing that it must be contained inside the system body described before,
Thank in advacne,
Atarek
I have a problem and i need help,
I am designing an access control,
Generally the system go to sleep mode in order to save the battery life,
The problem is that i want the system to detect the presence of the Mifare RFID tag in order to go to wake up mode,
knowing that the electronics is to be enclosed in a metal body with a plastic cover,
What type of sensing method can be used in order to detect the presence of the tag knowing that it must be contained inside the system body described before,
Thank in advacne,
Atarek





RE: detect the precense of the body inside enclosure
Dan - Owner
http://www.Hi-TecDesigns.com
RE: detect the precense of the body inside enclosure
A really good friend will help you move a body.
You need a really good friend.
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: detect the precense of the body inside enclosure
RE: detect the precense of the body inside enclosure
There are now gesture sensors that you can use dumbed down versions of that will detect 'presence'. https://www.microchip.com/design-centers/capacitive-touch-sensing
They have a 'very low power' section too.
Keith Cress
kcress - http://www.flaminsystems.com
RE: detect the precense of the body inside enclosure
Sorry - that's all help I can offer.
Gunnar Englund
www.gke.org
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.
RE: detect the precense of the body inside enclosure
TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! https://www.youtube.com/watch?v=BKorP55Aqvg
FAQ731-376: Eng-Tips.com Forum Policies forum1529: Translation Assistance for Engineers Entire Forum list http://www.eng-tips.com/forumlist.cfm
RE: detect the precense of the body inside enclosure
If it's "inside" the enclosure, then it's trivial to arrange an optical sensor where the LED's light is blocked by the tag when it's inserted into the enclosure.
OP: "...an access control...save the battery life..."
If this is controlling a door, then such system are typically powered from AC. So you don't worry about saving battery.
RE: detect the precense of the body inside enclosure
"You measure the size of the accomplishment by the obstacles you had to overcome to reach your goals" -- Booker T. Washington
RE: detect the precense of the body inside enclosure
Gunnar Englund
www.gke.org
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.
RE: detect the precense of the body inside enclosure
MacGyverS2000, I'm sry for the weak description, identification is based on RFID 13.56 Mhz, the system is battery powered, so, in order to save battery life, the system goes to sleep, but it can wake up when the user wave the card in front of it.
My problem is detecting the presence of the user card?
VE1BLL, the solution i'am developing is battery powered
Thank you,
Atarek
RE: detect the precense of the body inside enclosure
Dan - Owner
http://www.Hi-TecDesigns.com
RE: detect the precense of the body inside enclosure
One alternative is to use an ultra-low power presence sensor to wake up the RFID processor.
TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! https://www.youtube.com/watch?v=BKorP55Aqvg
FAQ731-376: Eng-Tips.com Forum Policies forum1529: Translation Assistance for Engineers Entire Forum list http://www.eng-tips.com/forumlist.cfm
RE: detect the precense of the body inside enclosure
Feel free to post a link to the supporting information that suggested to you that this approach was possible.
RE: detect the precense of the body inside enclosure
Agree. Add a "WAKE" push button.
Feasible. Easy. Not very arduous for the users, considering the limitation that it's battery powered. Done.